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High · 7.5 Scanner template Public exploit CVE-2025-55184 EUVD-2025-202877GHSA-2m3v-v2m8-q956

Denial of Service Vulnerability in React Server Components

Published Dec 11, 2025 · Updated Dec 15, 2025 · Assigned by Meta

Vendor: Meta Product: react-server-dom-parcel Product: react-server-dom-turbopack Product: react-server-dom-webpack Package: react-server-dom-parcel Package: react-server-dom-turbopack Package: react-server-dom-webpack Ecosystem: npm

Description

A pre-authentication denial of service vulnerability exists in React Server Components versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.0 and 19.2.1, including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints, which can cause an infinite loop that hangs the server process and may prevent future HTTP requests from being served.

Affected products

VendorProductAffectedFixed
Meta react-server-dom-webpack 19.0.0 – ≤ 19.0.1, 19.1.0 – ≤ 19.1.2, 19.2.0 – ≤ 19.2.1 —
Meta react-server-dom-turbopack 19.0.0 – ≤ 19.0.1, 19.1.0 – ≤ 19.1.2, 19.2.0 – ≤ 19.2.1 —
Meta react-server-dom-parcel 19.0.0 – ≤ 19.0.1, 19.1.0 – ≤ 19.1.2, 19.2.0 – ≤ 19.2.1 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 9 repositories

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

Affected packages

EcosystemPackageAffectedFixedRecord
npm react-server-dom-parcel >= 19.0.0, < 19.0.2 19.0.2 GHSA-2m3v-v2m8-q956
npm react-server-dom-parcel >= 19.1.0, < 19.1.3 19.1.3 GHSA-2m3v-v2m8-q956
npm react-server-dom-parcel >= 19.2.0, < 19.2.2 19.2.2 GHSA-2m3v-v2m8-q956
npm react-server-dom-turbopack >= 19.0.0, < 19.0.2 19.0.2 GHSA-2m3v-v2m8-q956
npm react-server-dom-turbopack >= 19.1.0, < 19.1.3 19.1.3 GHSA-2m3v-v2m8-q956
npm react-server-dom-turbopack >= 19.2.0, < 19.2.2 19.2.2 GHSA-2m3v-v2m8-q956
npm react-server-dom-webpack >= 19.0.0, < 19.0.2 19.0.2 GHSA-2m3v-v2m8-q956
npm react-server-dom-webpack >= 19.1.0, < 19.1.3 19.1.3 GHSA-2m3v-v2m8-q956
npm react-server-dom-webpack >= 19.2.0, < 19.2.2 19.2.2 GHSA-2m3v-v2m8-q956

Advisories 3

References